Primary fuel filter on passenger front frame - NAPA 3511 or Wix 33511
Secondary fuel filters on motor - NAPA 3512 or Wix 33512 - 2 required
O-ring Gasket for the Primary Fuel Filter - NAPA 5131
O-ring Gasket for the Secondary Fuel Filter - NAPA 5070
Secondary Filter 3512 comes with 2 gaskets.
1 is the 5095 which is 4.031 O.D., 3.468 I.D., .093 Thick.
1 is the 5133 which is 3.663 O.D., 3.437 I.D., .125 Thick.
This can be used in place of the 5131 which is 3.587 O.D., 3.317 I.D., .125 Thick.
They will interchange in the filter housing. That is only .076 difference.
Every time you change fuel filters you get 2 of these 5133 gaskets with the 3512 filter.
Woody's has the 5131 for .31 cents each and has 151 of them in stock. 1/08/12